20-year-old "16 and Pregnant" star Sean Garinger died from skull fracture due to ATV accident in February.

16 and Pregnant star Sean Garinger's cause of death has been revealed as a blunt force injury to the head due to a skull fracture, following a tragic ATV accident in February. The 20-year-old father of two was moving the ATV in his driveway when the ground gave way, flipping the vehicle and crushing his skull. Garinger's family marked the accident site as hallowed ground with a makeshift memorial.